# Airworthiness Directives; Bombardier, Inc. Airplanes
> **Rule** · Final rule. · Published 2013-08-06 · Effective 2013-09-10 · 78 FR 47543
## Document
- **Document number:** 2013-18771
- **Category:** airworthiness
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 78 FR 47543
- **Publication date:** 2013-08-06
- **Effective date:** 2013-09-10
- **FAA docket:** Docket No. FAA-2013-0209
## Abstract

We are superseding airworthiness directive (AD) 2012-14-04 for certain Bombardier, Inc. Model DHC-8-100, -200, and -300 series airplanes. AD 2012-14-04 required replacing certain parking brake accumulators. This new AD retains this requirement. This new AD also requires installing restraint devices around the parking brake accumulator end caps. We are issuing this AD to prevent failure of a parking brake accumulator screw cap or end cap resulting in loss of the number 2 hydraulic system and damage to airplane structures, which could adversely affect the controllability of the airplane.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/08/06/2013-18771/airworthiness-directives-bombardier-inc-airplanes)
---
*AI Analytics · CC0 1.0*